Diphenyl carbonate (DPC) is an important precursor for the synthesis of polycarbonate, which is an indispensable thermoplastic resin in industry.It is considered that the method of heterogeneous oxidative carbonylation of phenol, carried on the fixed bed reactor, was an environmentally benign synthetic route for the synthesis of DPC.Due to the inherent disadvantages of fixed bed reactors, such as high-pressure drops and inefficient interphase mass and heat transfer properties, the catalytic properties of this gas-liquid-solid three-phase chemical process was not satisfactory.These problems can be eliminated by using the magnetically stabilized bed (MSB), which could control the movement of magnetizable solid catalyst through an externally applied magnetic field.The components and saturation magnetization value of the magnetic catalyst is the key to the appliction of MSB system in the synthesis of DPC.In this work, perovskites supports of general formula LaxPb1-xMnO3 (x =0.2, 0.3, 0.4, 0.5 and 0.6) were synthesized by the sol-gel method.The composites were characterized by XRD, BET, EDS, H2-TPR and VSM.The catalytic activity in the oxidative carbonylation of phenol was evaluated and the effect of Pb addition was investigated.It was found that the catalytic activities dont show a linear correlation with their saturation magnetization values.Among these composites, the magnetic support with x=0.5 has the highest activity for the preparation of DPC with 11.2% yield.The hysteresis loop of this support demonstrate the better saturation magnetization value of 20.2 emu·g-1 of ferromagnetic behaviors, which is suitable for the application in MSB reactor.